I’ve found that beginners get apprehensive when mixing and settle for slow fades when sometimes they just need to cut it out. Don’t settle for a compromise, just go for what you want and if it doesn’t work out try something different.
Basically, what you made was a mash up. You took 2 tracks and put them together to make one. When you mix you play an entire set for some period of time. I can’t really offer any advice on mash ups, I’ve never made one and I have no interest in them. From a djing perspective I would want to see how you transition from one track to the next. In the interest of a dj set, the back forth nature of what you did would begin to irritate your audience after a while. In my opinion, when you’re starting out I would recommend working on intro/outro mixing from one track to the next and after you nail that you can move on to more complicated things like live mash ups, etc.